Bluetooth: Mesh: Add external flash support to DFU samples on nRF54L

[ludvigsj]

This adds the required application configuration and mcuboot configuration required to make the DFU samples work with the ext_flash file suffix on both nRF52840 and nRF54L15 DKs.

[ludvigsj]

DNM until #24879 is merged, since this is required to make this work on the nRF54L15 DK. Can be reviewed already.

Note, I have run system tests of DFU upload on both external flash and internal flash across both nRF52840 and nRF54L15, they all pass on my desk.

[NordicBuilder]

CI Information

^{To view the history of this post, clich the 'edited' button above}
Build number: 4

Inputs:

Sources:

sdk-nrf: PR head: a1352ee7d4bfcad06659124f2c246b290e0429cf

more details

sdk-nrf:

PR head: a1352ee7d4bfcad06659124f2c246b290e0429cf
merge base: 5390eed3d2c826cece40a03c993d0712628fed60
target head (main): 492a2e909230366db298db9ca4bc4bc8a13c8bf2
Diff

Github labels

Enabled	Name	Description
	ci-disabled	Disable the ci execution
	ci-all-test	Run all of ci, no test spec filtering will be done
	ci-force-downstream	Force execution of downstream even if twister fails
	ci-run-twister	Force run twister
	ci-run-zephyr-twister	Force run zephyr twister

List of changed files detected by CI (25)

doc
│  ├── nrf
│  │  ├── releases_and_maturity
│  │  │  ├── releases
│  │  │  │  │ release-notes-changelog.rst
samples
│  ├── bluetooth
│  │  ├── mesh
│  │  │  ├── dfu
│  │  │  │  ├── distributor
│  │  │  │  │  ├── README.rst
│  │  │  │  │  ├── app_ext_flash.overlay
│  │  │  │  │  ├── boards
│  │  │  │  │  │  │ nrf54l15dk_nrf54l15_cpuapp_ext_flash.conf
│  │  │  │  │  ├── sysbuild
│  │  │  │  │  │  ├── mcuboot.conf
│  │  │  │  │  │  ├── mcuboot
│  │  │  │  │  │  │  ├── app.overlay
│  │  │  │  │  │  │  ├── app_ext_flash.overlay
│  │  │  │  │  │  │  ├── boards
│  │  │  │  │  │  │  │  ├── nrf52840dk_nrf52840_ext_flash.conf
│  │  │  │  │  │  │  │  ├── nrf54l15dk_nrf54l15_cpuapp_ext_flash.conf
│  │  │  │  │  │  │  │  │ nrf54l15dk_nrf54l15_cpuapp_ext_flash.overlay
│  │  │  │  │  │  │  ├── prj.conf
│  │  │  │  │  │  │  ├── socs
│  │  │  │  │  │  │  │  ├── nrf54l10_cpuapp.conf
│  │  │  │  │  │  │  │  │ nrf54l15_cpuapp.conf
│  │  │  │  ├── target
│  │  │  │  │  ├── README.rst
│  │  │  │  │  ├── app_ext_flash.overlay
│  │  │  │  │  ├── boards
│  │  │  │  │  │  │ nrf54l15dk_nrf54l15_cpuapp_ext_flash.conf
│  │  │  │  │  ├── sysbuild
│  │  │  │  │  │  ├── mcuboot
│  │  │  │  │  │  │  ├── app.overlay
│  │  │  │  │  │  │  ├── app_ext_flash.overlay
│  │  │  │  │  │  │  ├── boards
│  │  │  │  │  │  │  │  ├── nrf52840dk_nrf52840_ext_flash.conf
│  │  │  │  │  │  │  │  ├── nrf52840dongle_nrf52840.conf
│  │  │  │  │  │  │  │  ├── nrf54l15dk_nrf54l15_cpuapp_ext_flash.conf
│  │  │  │  │  │  │  │  │ nrf54l15dk_nrf54l15_cpuapp_ext_flash.overlay
│  │  │  │  │  │  │  ├── prj.conf
│  │  │  │  │  │  │  ├── socs
│  │  │  │  │  │  │  │  ├── nrf54l10_cpuapp.conf
│  │  │  │  │  │  │  │  │ nrf54l15_cpuapp.conf

Outputs:

Toolchain

Version: a7529a11f4
Build docker image: docker-dtr.nordicsemi.no/sw-production/ncs-build:a7529a11f4_bba2ea5f2e

Test Spec & Results: ✅ Success; ❌ Failure; 🟠 Queued; 🟡 Progress; ◻️ Skipped; ⚠️ Quarantine

• ◻️ Toolchain - Skipped: existing toolchain is used
• ✅ Build twister
  • sdk-nrf test count: 12
• ✅ Integration tests
  • ✅ test-fw-nrfconnect-ble_mesh

Disabled integration tests

• • desktop52_verification
  • test_ble_nrf_config
  • test-fw-nrfconnect-apps
  • test-fw-nrfconnect-ble_samples
  • test-fw-nrfconnect-chip
  • test-fw-nrfconnect-fem
  • test-fw-nrfconnect-nfc
  • test-fw-nrfconnect-nrf-iot_cloud
  • test-fw-nrfconnect-nrf-iot_libmodem-nrf
  • test-fw-nrfconnect-nrf-iot_lwm2m
  • test-fw-nrfconnect-nrf-iot_samples
  • test-fw-nrfconnect-nrf-iot_serial_lte_modem
  • test-fw-nrfconnect-nrf-iot_thingy91
  • test-fw-nrfconnect-nrf-iot_zephyr_lwm2m
  • test-fw-nrfconnect-nrf_crypto
  • test-fw-nrfconnect-proprietary_esb
  • test-fw-nrfconnect-ps-main
  • test-fw-nrfconnect-rpc
  • test-fw-nrfconnect-rs
  • test-fw-nrfconnect-tfm
  • test-fw-nrfconnect-thread-main
  • test-low-level
  • test-sdk-audio
  • test-sdk-dfu
  • test-sdk-find-my
  • test-sdk-mcuboot
  • test-sdk-pmic-samples
  • test-sdk-wifi
  • test-secdom-samples-public

Note: This message is automatically posted and updated by the CI

[github-actions]

You can find the documentation preview for this PR here.

Preview links for modified nRF Connect SDK documents:

https://ncsdoc.z6.web.core.windows.net/PR-24880/nrf/releases_and_maturity/releases/release-notes-changelog.html
https://ncsdoc.z6.web.core.windows.net/PR-24880/nrf/samples/bluetooth/mesh/dfu/distributor/README.html
https://ncsdoc.z6.web.core.windows.net/PR-24880/nrf/samples/bluetooth/mesh/dfu/target/README.html

[alxelax]

In general lgtm. There are a couple of questions. Please take a look at the comments.

[ludvigsj]

A general explanation here: A lot of the files under sysbuild/mcuboot are exact copies of the files that exist in the sdk-mcuboot repo: https://github.com/nrfconnect/sdk-mcuboot/tree/main/boot/zephyr
Since before this PR, these files were pulled straight from that repo when building, I included them as-is for the most part to keep the configuration the same as it was before this PR.

These files are exact copies:

• boards/
  • nrf54l15dk_nrf54l15_cpuapp_ext_flash.overlay
  • nrf52840dongle_nrf52840.conf
• socs/
  • nrf54l10_cpuapp.conf
  • nrf54l15_cpuapp.conf
• app.overlay
• prj.conf (except final line in distributor, which is added by us)